4.2.3.32 (+)-copalyl diphosphate - 4.2.3.32 additional information catalyzes an intermediate step in synthesis of ginkgolide A 4.2.3.32 additional information abietadiene synthase (PaLAS) is a bifunctional terpene synthase that catalyzes both class I and class II reactions, i.e. formation of (+)-copalyl diphosphate from geranylgeranyl diphosphate (cf. EC 5.5.1.12, class II diTPS), and formation of abieta-8(14),12-diene from (+)-copalyl diphosphate (EC 4.2.3.32, class I diTPS)